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提高小钎杆寿命的径途  [PDF]
林鼎文
华侨大学学报(自然科学版) , 1981, DOI: 10.11830/ISSN.1000-5013.1981.01.0094
Abstract: 本文着重从小钎杆的疲劳特性,内孔强化,冶金质量,防腐与表面强化等方面,论述提高国产55S_iM_nM。小钎杆使用寿命的途径。文中指出:提高钎钢抗过负荷能力和循环韧性;采用高淬透性合全管作内孔衬管,并使衬管与基体完全粘合;减少钢中的夹杂物与疏松等缺陷,以及防腐配合表面强化等是提高小钎杆寿命的重要措施。
Polygodial, the fungitoxic component from the Brazilian medicinal plant Polygonum punctatum
Alves, Tania Maria de Almeida;Ribeiro, Fabiane Lacerda;Kloos, Helmut;Zani, Carlos Leomar;
Memórias do Instituto Oswaldo Cruz , 2001, DOI: 10.1590/S0074-02762001000600016
Abstract: polygonum punctatum (polygonaceae) is an herb known in some regions of brazil as "erva-de-bicho" and is used to treat intestinal disorders. the dichloromethane extract of the aerial parts of this plant showed strong activity in a bioautographic assay with the fungus cladosporium sphaerospermum. the bioassay-guided chemical fractionation of this extract afforded the sesquiterpene dialdehyde polygodial as the active constituent. the presence of this compound with antibiotic, anti-inflammatory and anti-hyperalgesic properties in "erva-de-bicho" may account for the effects attributed by folk medicine to this plant species.
Polygodial, the fungitoxic component from the Brazilian medicinal plant Polygonum punctatum  [cached]
Alves Tania Maria de Almeida,Ribeiro Fabiane Lacerda,Kloos Helmut,Zani Carlos Leomar
Memórias do Instituto Oswaldo Cruz , 2001,
Abstract: Polygonum punctatum (Polygonaceae) is an herb known in some regions of Brazil as "erva-de-bicho" and is used to treat intestinal disorders. The dichloromethane extract of the aerial parts of this plant showed strong activity in a bioautographic assay with the fungus Cladosporium sphaerospermum. The bioassay-guided chemical fractionation of this extract afforded the sesquiterpene dialdehyde polygodial as the active constituent. The presence of this compound with antibiotic, anti-inflammatory and anti-hyperalgesic properties in "erva-de-bicho" may account for the effects attributed by folk medicine to this plant species.
Combination Effect of Miconazole with Polygodial against Candida albicans  [PDF]
Isao Kubo, Sang Hwa Lee, Kuniyoshi Shimizu
Open Journal of Medical Microbiology (OJMM) , 2011, DOI: 10.4236/ojmm.2011.11002
Abstract: The combination effect of miconazole with polygodial against Candida albicans was investigated by an in vitro checkerboard method. Isobolograms, fractional inhibitory concentration (FIC), and fractional fungicidal concentration (FFC) indices were used for evaluating the interaction between compounds combined. The combination of miconazole with polygodial exhibited strong synergism on both fungistatic and fungicidal action against this opportunistic pathogen.
园 林 绿 化 节 水 途 径 探 究  [PDF]
朱永兴
北方园艺 , 2010, DOI: 10.11937/bfyy.201021049
Abstract:
From Labdanes to Drimanes. Degradation of the Side Chain of Dihydrozamoranic Acid.  [PDF]
Jesús M.L. Rodilla,D. Díez,J. G. Urones,Pedro M. Rocha
Molecules , 2004, DOI: 10.3390/90500300
Abstract: A new route for the degradation of the saturated side chain of dihydrozamoranic acid has been devised, giving an advanced intermediate, compound 14, useful for the synthesis of insect antifeedants such as warburganal and polygodial.
多途信道中声屏蔽及声聚焦  [PDF]
惠俊英,余赘,惠娟,滕超
哈尔滨工程大学学报 , 2009,
Abstract: 针对传统阵处理无法分辨同~方向上2个点源的缺陷,提出了多途信道中声屏蔽技术.将声屏蔽技术应用于抗拖船干扰,把拖曳线列阵接收的拖船干扰和同方向的目标信号在频域通过一个屏蔽、聚焦权滤波器,在对干扰屏蔽的同时,对目标聚焦.仿真结果表明,干扰源的辐射噪声被显著抑制,而所期望的目标信号清晰可见,其输出相干信噪比大幅度提高,该技术在抑制拖船干扰的同时可以有效消除在该方向的探测盲区.
复倒谱域水声信道多途抑制技术  [PDF]
付进,许婉琰,王燕,梁国龙
哈尔滨工程大学学报 , 2015, DOI: 10.11990/jheu.201406046
Abstract: 水下声信道因边界反射及介质不均匀性而呈现多途特性,如何采取有效措施抑制信道多途影响一直以来都是水声领域的难点和热点问题。基于同态滤波基本原理,研究了水声多途信道的复倒谱特性,据此提出了一种适用于将信道与信号分离的复倒谱域特征滤波器构建方法,并与常用的低通特征滤波器、梳状特征滤波器进行了对比分析。研究结果表明,提出的方法可有效抑制信道多途,且与上述2种特征滤波器比较,所提方法具有构建方法简易、重构信号误差较小等特点,具有工程应用价值。
踪迹随风叶,程途犯斗槎──漫谈流动显示及应用  [PDF]
王振东
力学与实践 , 1996, DOI: 10.6052/1000-0992-1996-066
Abstract: 踪迹随风叶,程途犯斗槎──漫谈流动显示及应用王振东(天津大学力学系,天津300072)月冷吟蛩草,湖平宿鹭沙.客愁无锦字,乡信有灯花.踪迹随风叶,程途犯斗槎.君看枝上鹊,薄暮亦还家.这首篇名“道中’的五言律诗[1]为宋代诗人范成大(1126年~119...
多途条件下近场声源三维被动定位  [PDF]
梁国龙,韩博,孙向前
兵工学报 , 2014, DOI: 10.3969/j.issn.1000-1093.2014.03.006
Abstract: ?为了解决近场被动目标的三维定位问题,在多途条件下提出了一种水平阵定位方法。任意选择扫描深度获得二维声图测量结果,进而在二维扫描平面搜索谱峰,得到目标信源与海面镜像虚源的聚焦点位置;利用它们的几何关系对测量结果进行修正,得到目标的三维坐标。仿真结果表明:不同的扫描深度对定位精度的影响较小;随着目标远离阵列,定位误差逐渐增大;在靠近阵列的区域里,多途聚焦点与直达声聚焦点混叠,方法失效。因此,该方法可以在多途条件下对一定范围内的近场被动目标实现三维定位。
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